Allow Aurora Serverless scaling to zero capacity.

[ohookins]

Description

https://aws.amazon.com/blogs/database/introducing-scaling-to-0-capacity-with-amazon-aurora-serverless-v2

Aurora Serverless now supports scaling to 0 (previously the minimum was 0.5). There are some additional checks around specific versions of the engine (e.g. PostgreSQL versions) but these are likely to change reasonably frequently and may not be wise to encode in the provider. API checks at runtime will error out if an incompatible engine version is selected.

Relations

Closes #40226.
Closes #40427.
Closes #40421.

References

https://aws.amazon.com/blogs/database/introducing-scaling-to-0-capacity-with-amazon-aurora-serverless-v2

Output from Acceptance Testing

make testacc TESTS=TestAccRDSCluster_serverlessV2ScalingConfiguration PKG=rds
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.23.2 test ./internal/service/rds/... -v -count 1 -parallel 20 -run='TestAccRDSCluster_serverlessV2ScalingConfiguration'  -timeout 360m
2024/11/21 18:42:49 Initializing Terraform AWS Provider...
=== RUN   TestAccRDSCluster_serverlessV2ScalingConfiguration
=== PAUSE TestAccRDSCluster_serverlessV2ScalingConfiguration
=== CONT  TestAccRDSCluster_serverlessV2ScalingConfiguration
    cluster_test.go:1948: Error running post-test destroy, there may be dangling resources: exit status 1

        Error: Invalid provider configuration

        Provider "registry.terraform.io/hashicorp/aws" requires explicit
        configuration. Add a provider block to the root module and configure the
        provider's required arguments as described in the provider documentation.


        Error: unable to add custom RootCAs HTTPClient, has no WithTransportOptions, *http.Client

          with provider["registry.terraform.io/hashicorp/aws"],
          on <empty> line 0:
          (source code not available)

--- FAIL: TestAccRDSCluster_serverlessV2ScalingConfiguration (184.60s)
FAIL
FAIL	github.com/hashicorp/terraform-provider-aws/internal/service/rds	189.981s
FAIL
make: *** [testacc] Error 1

Not quite sure what's going on here, it doesn't seem related to the change since it happens on the main branch as well. I checked the debug logs and the clusters are created properly, it just doesn't seem to clean up after a provider credential change 🤔

[github-actions]

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[geshan]

+1

[fatbasstard]

Nice, this enables the scale back to 0 for serverless v2

It is posssible to add the seconds_until_auto_pause attribute, this makes it actually configurable (default is 300 seconds)

[ViktorCollin]

This PR should add the seconds_until_auto_pause parameter to the existing PR

[garym-krrv]

Documentation should be updated too but + for the PR

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccRDSCluster_serverlessV2ScalingConfiguration\|TestAccRDSCluster_enableHTTPEndpointProvisioned\|TestAccRDSCluster_engineMode' PKG=rds
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.23.3 test ./internal/service/rds/... -v -count 1 -parallel 20  -run=TestAccRDSCluster_serverlessV2ScalingConfiguration\|TestAccRDSCluster_enableHTTPEndpointProvisioned\|TestAccRDSCluster_engineMode -timeout 360m
2024/12/04 09:04:40 Initializing Terraform AWS Provider...
=== RUN   TestAccRDSCluster_engineMode
=== PAUSE TestAccRDSCluster_engineMode
=== RUN   TestAccRDSCluster_serverlessV2ScalingConfiguration
=== PAUSE TestAccRDSCluster_serverlessV2ScalingConfiguration
=== RUN   TestAccRDSCluster_enableHTTPEndpointProvisioned
=== PAUSE TestAccRDSCluster_enableHTTPEndpointProvisioned
=== CONT  TestAccRDSCluster_engineMode
=== CONT  TestAccRDSCluster_enableHTTPEndpointProvisioned
=== CONT  TestAccRDSCluster_serverlessV2ScalingConfiguration
--- PASS: TestAccRDSCluster_serverlessV2ScalingConfiguration (174.19s)
--- PASS: TestAccRDSCluster_enableHTTPEndpointProvisioned (190.18s)
--- PASS: TestAccRDSCluster_engineMode (386.20s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/rds	391.747s

[jar-b]

LGTM 🚀

[ewbankkit]

@ohookins Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.80.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!